Updates the proximity monitor component (#15836)

* prox component update

* mochi review

* bug fix, makes proximity sensors always active

* GC fixes and removes an unused proc

* Disposal fixes from TM

* fixes runtimes when objects created in nullspace runtimes, fixes portable flasher

* a fresh perspective

* lewcc review

* adds comment about direct loc setting over forceMove

code/game/objects/items/devices/transfer_valve.dm

@@ -62,8 +62,6 @@
 		to_chat(user, "<span class='notice'>You attach [A] to the valve controls and secure it.</span>")
 		A.holder = src
 		A.toggle_secure()	//this calls update_icon(), which calls update_icon() on the holder (i.e. the bomb).
-		if(istype(attached_device, /obj/item/assembly/prox_sensor))
-			AddComponent(/datum/component/proximity_monitor)
 
 		investigate_log("[key_name(user)] attached a [A] to a transfer valve.", INVESTIGATE_BOMB)
 		add_attack_logs(user, src, "attached [A] to a transfer valve", ATKLOG_FEW)
@@ -139,7 +137,6 @@
 				attached_device.forceMove(get_turf(src))
 				attached_device.holder = null
 				attached_device = null
-				qdel(GetComponent(/datum/component/proximity_monitor))
 				update_icon()
 		else
 			. = FALSE